20730276 has 96 divisors (see below), whose sum is σ = 65076480. Its totient is φ = 5571072.

The previous prime is 20730271. The next prime is 20730277. The reversal of 20730276 is 67203702.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20730271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12046 + ... + 13658.

It is an arithmetic number, because the mean of its divisors is an integer number (677880).

Almost surely, 2^20730276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20730276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32538240).

20730276 is an abundant number, since it is smaller than the sum of its proper divisors (44346204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20730276 is a wasteful number, since it uses less digits than its factorization.

20730276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20730276 is about 4553.0512845783. The cubic root of 20730276 is about 274.7061367802.

Adding to 20730276 its reverse (67203702), we get a palindrome (87933978).

The spelling of 20730276 in words is "twenty million, seven hundred thirty thousand, two hundred seventy-six".